Create a document generator for the project.

[Zach777]

• [x] Create the initial document generator
• [x] Parse a file in the project for relevant info
• [x] Make it where you can automatically parse all gd files at once.
• [X] Generate an md document from the relevant info
• [ ] Make generated docs look like Godot official docs.
• [x] Work as a plugin
• [X] Select where you want the generated docs to be saved on your computer

[Moonwards]

Ya know, just to say, the Godot official docs look like they are about to change. So, I bet how they look is going to change.